The student is turned into a Demi-Fiend as the world falls into what is known as the Conception: an apocalypse-level event.
The game itself puts you in the role of a Japanese high school student in the midst of Tokyo. This release by Atlus first arrived in 2004, though a high-definition remaster was released in 20 for consoles and PC.
If you like your RPGs to come with a bit of post-apocalyptic drama, then you might just find that Shin Megami Tensei: Nocturne is up your street.